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Unit Conversion. There are two systems of unit in common use for gaseous and particular pollutants: Mass per unit volume: usually µg -3. The mass of pollutant is expressed as a ratio to the volume of air.
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This is a converter for units used in the field of air pollution. Usage: At first choose the pollutant from the pull-down-menu. You may choose O 3, NO 2, NO, SO 2, CO, CO 2, or H 2 O.
Conversion Factor Approach The approach used here is as follows: • As the equipment usually does not display the radiation protection quantity to be measured a conversion from cps to Bq/cm2 is necessary 57.8 cps Bq/cm2
31 maj 2020 · Currently, I am working on Sentinel 5p data in molecules/cm2. But I need to convert it to ppm (parts per million) in order to compare it with standard units in ppm or microgram/m^3.
22 maj 2015 · Atmospheric Chemistry Cheat Sheet. Version: 1.29 Last Update: 22 May 2015. Compiled by J.L. Jimenez, CU Boulder shortcut to this page: http://tinyurl.com/ac cheat. pu. 1. Key Conversions and Parameters. Conversions between mixing ratios and molec cm 3.
Convert 32.05 µg m-3 SO2 present in air in to ppbv at 1.0 atm pressure and 27oC. Solution. (i) Convert 32.05 µg SO2 into moles: SO2 in moles = 32.05 µg/M. W. of SO2 = 32.05×10-6/64.1 = 5×10-7. mol (ii) Convert 5×10-5 mol into number of SO2 molecules. Number of SO2 molecules = number of mole × Avogadrow’s No = 5×10-7× 6.02×1023 = 3.1 ...
The number density nX of a gas X is defined as the number of molecules of X per unit volume of air. It is expressed commonly in units of molecules cm-3 (number of molecules of X per cm3 of air). Number densities are critical for calculating gas-phase reaction rates. Consider the bimolecular gas-phase reaction.
